Heating-furnace.



306,628. I A PATBN'TED-DEO.5,1905. Y

w, N. BEST.

` HEATING PURNAAGE.

APPLIoATroN runnnmamlsoo.

iu a Il 1 gw/ I @Ml UNITED sTA-Tns PATENT orricn. y

WILLIAM NEWTON BEST, OF LOS ANGELES, CALIFORNIA, ASSIGNOR ATO JOHN H. BEST AND EZRA BEST, OF QUINOY, ILLINOIS.

HEATING-FURNACE.

Specification of Letters Patent.

Patented Dec. 5, 1905.

Application filed March 30, 1905. Serial No. 252,865.

To @ZZ whom it may concern Be it known that I, WTLLIAMNEWTON BEST, a citizen of the United States, and a residentof Los Angeles, in the county of Los Angeles and State of California, have invented a new and Improved Heating-Furnace, of which the following'is a full, clear, and exact description. -This invention relates particularly to improvements in furnaces for annealing portions of armor-plate where holes are to be drilled, for heating patches of metal, so that the same may be readily bent to form a perfect fit, and also for brazing and other purposes where intense heat is required, the object being to provide' a furnace for the above-mentioned purposes that may be conveniently handled and in which a low or cheap grade of fuel may be quickly volatilized-such fuel, for instance, as water-gas tar, coke-oven tar, crude oil, or residuum oil, that are not so easily volatilized as gasolene, coal-tar, or naptha.

I will describe-a heating-furnace embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a longitudinal section on the line 1 1 of Fig. 3 of a heating-furnace embodying my invention. Fig. 2 is a top plan thereof. Fig. 3 is a rear end view, and Fig. 4 is a section on the line 1 4. of Fig. 1.

The furnace comprises a casing 5, consisting of any suitable metal, and arranged in the casing is a lining 6, of a refractory materialsuch, for instance, as dre-brick. The refractory material has a longitudinal opening 7, the inlet end 8 of which is contracted, as is also the outlet end 9. 4Supported on a bracket 10 at thel inlet end of the furnace is a burner comprising an oil-discharge 11, having connection With a source of supply through a flexible tube 12, and arranged adjacent to the oil-discharge 11 is an air or steam supply nipple 13, connecting with a flexible tube 14.

The object in contracting the end of the openvolatile gases, and as the gases expand in the chamber or opening of the furnace thistaper or contracted portion provides a resistance, so

l that the fire does not force its way out of the burner end. The object in contracting the l outlet end is to provide an impact which causes an abrasive heat upon a limited space, such as is required in annealing armorplate. By numerous experiments I have found it necessary to eect the highest possible efficiency from the fuel, especially in annealing armorplate, that vents be provided, one being just inward of the beginning of the tapered outlet, as indicated at 15, and the other vent 16 is at the extreme end of the furnace.

The furnace is comparatively small and may be readily handled by a man. For convenience I provide it with a removable handle 17 and suspend it sothat it may be easily moved from place to place by means of a chain 18 adjustable in a yoke 19, having link vconnections 20 with the furnace. At the outlet end of the furnace is -a peep-hole 21, through which the nature of the ame from the burner may .be observed.

In the operation for annealing a spot in armor-plate the outlet end of the furnace is lto be held against the plate, as clearly indibe understood that the lheat of the refractory material assis ts combustion, as well as increases Vthe heat from the burner.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A heating-furnace comprising a refractory material having a longitudinal opening, the ends of the opening being contracted, the said furnace having a vent near the outlet end and also a vent at the extreme end, and means for introducing a heat-producing agent at the inlet end. y

2. A heating-furnace comprising a refractory material having a longitudinal opening, the ends ofthe opening being contracted, the said furnace having a vent near the outlet end and also avent at the eXtreme end, and a hydrocarbon-burner supported at the inlet end 0f the furnace.

IOOl

3. Aheating-furnaoe comprising a metal In testimony Wlieieoil'lv'e signed my naine casing, a lining of refractory material thereto this specification in the presence of two sub- IO in and having a longitudinal opening the ends scribing witnesses. of which are contracted or tapered, a vent in- 5' Ward of theoutlet end, a vent formed at the Y WILLIAM NEWTON BEST' end of the outlet portion, a hydrooarbon- Witnessesi burner at the inlet end, and an adjustable sus- JNO. M. RITTER,

pending device for the furnace. F. W. HANAFORD. 

